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There are randomness and fuzziness to a large extent in soil nutrient synthetic evaluation. In order to effectively solve the uncertain transformation problem between the qualitative concepts and evaluation indexes, which are described by membership function, based on the cloud theory and fuzzy mathematics theory, a fuzzy synthetic evaluation method was presented based on the cloud model. Taking Da’an City in Jilin Province as the research object, totally 7 soil nutrient elements contents were selected such as organic matter in the cultivated layer as evaluation, and the weight of each index was determined by using entropy method. The cloud model was applied to the comprehensive evaluation of soil nutrients, and the soil nutrient fuzzy comprehensive index of each evaluation unit was obtained (cloud fuzzy comprehensive index, CFCI). In addition, COK was used to get the interpolation of CFCI, and a distribution map of soil nutrients CFCI grade was formed. The results showed that the evaluation results from the data characteristics of the study area, CFCI was in the range of 2.43 ~ 4.89, the average value was 3.78, the standard deviation was 0.45, coefficient of variation was 11.85%, which was in moderate degree of variation;from the perspective of spatial distribution pattern of the evaluation results, the comprehensive level of soil nutrients in Da’an City was decreased gradually from north to south, and the higher concentration of cultivated land was, the higher the level of soil nutrient comprehensive was.